The HPDLab software and fit-testing research have been the topic of over twenty presentations at national and international conferences. The results of the comparison of field testing methods were published in the American Industrial Hygiene Association Journal. The HLR program has worked closely with hearing protector industry manufacturers who review NIOSH research findings and proposals.

Intermediate Outcomes

HPDLab was developed as a tool for the HLR program to research testing methods and as a product for commercial testing laboratories with a lowered entry cost. Both PRL and HLI laboratory have achieved NVLAP accreditation for ANSI S12.6-1997. HLI performs in-house testing of their products and has recently completed their portion of the NIOSH-sponsored interlaboratory study with the HPDLab software. The U.S. Army Aeromedical Research Laboratory and Gentex Corporation have commenced the installation of HPDLab for use in the development of crew communication systems.

The NIOSH Pittsburgh Research Laboratory HPDLab testing system uses commercially available signal generation equipment, audio amplifiers and speakers controlled through software developed by the HLR program